Diamond core drilling tools is one of our key products, we specialized in design, production and sales of Q series including AQ, BQ, NQ, HQ, PQ etc sizes from 2009, currently our major products include diamond impregnated bits, surface set bits, PDC bits, reaming shell, core barrel, wireline drill rods, casing and casing shoe etc diamond core drilling consumables, which are applicable for mining, geotechnical exploration etc drilling jobs...